#multiplayer | Unreal Source | Page 388

thin stratus Apr 15, 2018, 6:39 AM

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Yus

twin juniper Apr 15, 2018, 6:40 AM

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@misty stirrup but that's an IF check

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I'm not doing anything with it

misty stirrup Apr 15, 2018, 6:40 AM

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lol

twin juniper Apr 15, 2018, 6:40 AM

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if it's null it's not even going to enter it

misty stirrup Apr 15, 2018, 6:40 AM

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okay so

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UPROPERTY(EditAnywhere, ReplicatedUsing = OnRep_Foo

glacial pollen Apr 15, 2018, 6:40 AM

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Yes, the issue appears that DefaultImpactSound does not seem to be even valid enough to do a nullptr check against it. As in, it doesn't appear to have a valid address to check against?

thin stratus Apr 15, 2018, 6:40 AM

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Why don't you just wait for the callstack and stuff

misty stirrup Apr 15, 2018, 6:40 AM

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ReplicatedUsing = OnRep_Foo

thin stratus Apr 15, 2018, 6:40 AM

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Before arguing

misty stirrup Apr 15, 2018, 6:40 AM

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needs to be in there

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if you send me your full header

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i can send back what you need to change

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the variable doesn't exist in onrep due to ReplicatedUsing = OnRep_Foo

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missing

twin juniper Apr 15, 2018, 6:41 AM

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Waiting for it to open up, but why would I want to replicate it... even if it's not replicated and it's null (it's not) it shouldn't crash it since I'm not doing anything

misty stirrup Apr 15, 2018, 6:41 AM

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okay like

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read that macro

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= OnRep_Foo

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basically like

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idk

thin stratus Apr 15, 2018, 6:41 AM

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He doesn't want to replicate it

misty stirrup Apr 15, 2018, 6:42 AM

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am i wrong about replicatedusing?

thin stratus Apr 15, 2018, 6:42 AM

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Idk why this is relevant here. Idk what his stuff is doing atm

misty stirrup Apr 15, 2018, 6:42 AM

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what does replicatedusing

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he's calling an editanywhere variable in a function that's called from an onrep function

thin stratus Apr 15, 2018, 6:42 AM

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It calls the mentioned function when the variable is replicated on each entity

misty stirrup Apr 15, 2018, 6:43 AM

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oh what

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that's a dumb name for it then my b

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im also just dumb in general LOL

thin stratus Apr 15, 2018, 6:43 AM

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OnRep = OnReplicated

misty stirrup Apr 15, 2018, 6:43 AM

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wait what i thought

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he's trying to basically replicate his impact function

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from server

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to client

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i think

thin stratus Apr 15, 2018, 6:44 AM

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Can we just wait for his debugging

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Im not gonna put my sunday into guessing what it could be

glacial pollen Apr 15, 2018, 6:45 AM

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Yes please, I've been waiting 2 hours now, for chat in here to die down...

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While we wait. My clients can't find a session when using dedicated server. Are there some goto things to note?

thin stratus Apr 15, 2018, 6:51 AM

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yes

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Steam?

glacial pollen Apr 15, 2018, 6:53 AM

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no, nullsubsystem

thin stratus Apr 15, 2018, 6:53 AM

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So he's hosting it on the same PC?

misty stirrup Apr 15, 2018, 6:53 AM

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on the note of dedicated servers what's the terminology for that so i can look that up im getting close to having to actually package and test

glacial pollen Apr 15, 2018, 6:53 AM

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Yes I am

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Tried standalone and simulate and pie

thin stratus Apr 15, 2018, 6:53 AM

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@misty stirrup Just Dedicated Server

glacial pollen Apr 15, 2018, 6:53 AM

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All from within editor

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not packaged

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Also, dedicated loads the wrong map, ignores the DefaultServerMap setting

thin stratus Apr 15, 2018, 6:54 AM

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Does your DedicatedServer even create a Session?

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And DedicatedServer in PIE etc. isn't proper.

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You want to launch the Server outside of the Engine

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And then connect to it

glacial pollen Apr 15, 2018, 6:56 AM

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There is no way to use:

📎 unknown.png

thin stratus Apr 15, 2018, 6:56 AM

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You can adjust this file to do that without packaging a Server

📎 Start_DedicatedServer.bat

twin juniper Apr 15, 2018, 6:56 AM

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it's frozen and wont close

📎 unknown.png

glacial pollen Apr 15, 2018, 6:56 AM

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k

twin juniper Apr 15, 2018, 6:56 AM

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lovely stuff

thin stratus Apr 15, 2018, 6:56 AM

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You launched it through VS?

twin juniper Apr 15, 2018, 6:56 AM

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yes

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I'll restart my PC, will you guys be here in 10-20 mins?

thin stratus Apr 15, 2018, 6:57 AM

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Yes, but why does your PC take so long to restart?

twin juniper Apr 15, 2018, 6:57 AM

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It took few mins, but I've been waiting for UE4 to open up for 10-15 mins until I realized it froze

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won't even let me close it

thin stratus Apr 15, 2018, 6:58 AM

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Kill the process

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Under details

twin juniper Apr 15, 2018, 6:58 AM

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Tried it

glacial pollen Apr 15, 2018, 7:01 AM

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I opens the correct map now, but I do not see it creating a session, which is hard to do in dedicated without a PlayerController (ie createsession)

twin juniper Apr 15, 2018, 7:01 AM

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Waiting for VS to load now. You sure you don't want to look at the logs?

thin stratus Apr 15, 2018, 7:04 AM

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@glacial pollen Well you can add LogOnline and LogNet to your DefaultEngine.ini

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As VeryVerbose

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And see what happens

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Where are you calling the session creation code for the DediServer?

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@Itsco#6231 You can also send me a crashlog in the mean time

glacial pollen Apr 15, 2018, 7:04 AM

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I'm not, I cant without a PC

twin juniper Apr 15, 2018, 7:04 AM

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https://pastebin.com/iYTXu2aX

Pastebin

[2018.04.15-03.44.49:635][834]LogWindows: Error: Unhandled Excepti...

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Also, like I said removing these if checks stops it from crashing

thin stratus Apr 15, 2018, 7:05 AM

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@glacial pollen Well BP session creation nodes aren't used for DedicatedServers anyway

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You have to use C++ or a Plugin

glacial pollen Apr 15, 2018, 7:05 AM

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To find a dedicated server's session?

thin stratus Apr 15, 2018, 7:05 AM

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To host them in the first place

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The default CreateSession Node is for ListenServers

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@Itsco#6231 That's only showing a portion

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Can you link a hastebin to your gun.h and gun.cpp?

glacial pollen Apr 15, 2018, 7:06 AM

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I was told on here, that dedicated automatically creates a session

thin stratus Apr 15, 2018, 7:06 AM

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That's wrong

glacial pollen Apr 15, 2018, 7:07 AM

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Welp. Thanks

thin stratus Apr 15, 2018, 7:07 AM

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There is an extra function in C++, called RegisterServer, that you usually override to implement a SessionCreation

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I think it's in AGameSession

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You don't have to use that

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But you do have to code the SEssionCreation

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Or use the advanced session plugin

glacial pollen Apr 15, 2018, 7:07 AM

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Its okay

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I've been sticking with vanilla UE4.... I'll just ... figure something... rethink...

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but thank you

twin juniper Apr 15, 2018, 7:09 AM

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@thin stratus it loaded, do you still want me to debug it, or was it enough?

thin stratus Apr 15, 2018, 7:10 AM

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If you loaded it through VS

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Cause the crash

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I want to see where it breaks in code and what the callstack and the variables say

twin juniper Apr 15, 2018, 7:10 AM

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Ok, just a sec

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for now

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the realted things from the header file:

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https://pastebin.com/Vh1YV7SV

Pastebin

public: // Play the impact effects void PlayImpactEffects(...

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from cpp

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https://pastebin.com/Y63uAFLj

Pastebin

void AGun::PlayImpactEffects(const FHitResult& Impact) { USo...

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There is more to show, but I'll debug first

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it hit a breakpoint right here

📎 unknown.png

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that's from the OnRep function

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📎 unknown.png

thin stratus Apr 15, 2018, 7:12 AM

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Yeah can you show a bit more please

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Not only one line at a atime

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Show the whole call stack

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And also the variables on the left

twin juniper Apr 15, 2018, 7:13 AM

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It's just a linetrace so I can pass the HitResult to the PlayImpactEffects, but I'll send ti anyway

thin stratus Apr 15, 2018, 7:13 AM

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:P

twin juniper Apr 15, 2018, 7:14 AM

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📎 unknown.png

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I've stopped debugging so I'll reopen it for the callstack

thin stratus Apr 15, 2018, 7:14 AM

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Also the variables please

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On the left side you should see a list of local variables

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Depending on what element of the callstack you are viewing

twin juniper Apr 15, 2018, 7:15 AM

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Ok, the thing is that I'm calling the function from different places

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it never crashes

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only from that cursed OnRep function

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I thought for a second that might be because Gun is null

📎 unknown.png

glacial pollen Apr 15, 2018, 7:18 AM

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@twin juniper Dude, if cedric asks for a screenshot of your background you give it to him. He is your ONLY hope right now. Do exactly what he wants. He knows more than you can imagine

twin juniper Apr 15, 2018, 7:18 AM

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but it calls PlayImpactEffects, so that's not it too.... I'm hopeless

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@glacial pollen It's loading up

glacial pollen Apr 15, 2018, 7:18 AM

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k

thin stratus Apr 15, 2018, 7:18 AM

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Your callstack seems to enter the PlayImpactEffects

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Also your Local Variables will show if the Gun is null

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That's why I want to have a look at that

twin juniper Apr 15, 2018, 7:19 AM

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It's not null. Yeah screenshoting it

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Output log

📎 unknown.png

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📎 unknown.png

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📎 unknown.png

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📎 unknown.png

misty stirrup Apr 15, 2018, 7:20 AM

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press ctrl+ptrsc and then ctrl+v

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ignore me i didnt scroll up

thin stratus Apr 15, 2018, 7:22 AM

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Can you go one back

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Where the Play stuff is called

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And see if the gun is valid

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Bizarre

twin juniper Apr 15, 2018, 7:23 AM

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it's not

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I'm setting it up on PostInitComps

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Spawning the projectile on the server

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Gun = Cast<AGun_Ranged_Projectile>(GetOwner());

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Is Owner null for remote clients?

thin stratus Apr 15, 2018, 7:24 AM

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If the Owner is the PlayerController, then yes

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So not here

twin juniper Apr 15, 2018, 7:24 AM

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It's the gun

thin stratus Apr 15, 2018, 7:24 AM

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Is the gun Replicated?

twin juniper Apr 15, 2018, 7:24 AM

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the Instaigtor is a player controller

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It's not, but should it?

thin stratus Apr 15, 2018, 7:24 AM

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Can you try to put a simple "if(Gun)" in front of that call

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And see if it still crashes

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So we are sure that the gun is really causing it

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Well for an Actor to be moved across the net, it needs to be marked repliacted

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If you set teh Owner of the Bullet to the Gun, and the Gun is not replicated, then the owner won't be valid on clients

twin juniper Apr 15, 2018, 7:26 AM

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Right, the projectile is replicated

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PostInitComps should be called on any client, doesnt it?

thin stratus Apr 15, 2018, 7:27 AM

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It's an Actor thing. Doesn't have to anythin with replication.
It calls on an instance of an actor. If a Client has that actor, it calls that function.

twin juniper Apr 15, 2018, 7:27 AM

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@thin stratus Ok, it's not crashing

thin stratus Apr 15, 2018, 7:27 AM

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Can you check the gun for being valid

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Welp

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The GunActor, is that set to replicate?

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Like in the Class

twin juniper Apr 15, 2018, 7:27 AM

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Right, so why is the Gun null then?

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no, it's not

thin stratus Apr 15, 2018, 7:28 AM

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So how do you want to reference the same gun over the net?

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Or are you doing something majorly differnet than most people do?

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Gun should be spawned on the Server

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Marked as replicated

twin juniper Apr 15, 2018, 7:28 AM

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I'm setting it up on PostInitializeComponents, spawning the projectile on the server

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Doesn't PostInit get's called on any instance?

thin stratus Apr 15, 2018, 7:29 AM

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Yeah, but what do you mean with Setting it up

twin juniper Apr 15, 2018, 7:29 AM

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Gun = ...

thin stratus Apr 15, 2018, 7:29 AM

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I mean the actor, not the GunVariable

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Your actual Gun Class

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Is that marked as Replicated

twin juniper Apr 15, 2018, 7:29 AM

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obv

thin stratus Apr 15, 2018, 7:29 AM

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:D Ah well you never know

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And you pass the Gun to the ProjectileActor as its owner?

twin juniper Apr 15, 2018, 7:30 AM

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Yes, on PostInitComps

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or you mean

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on SpawnParams?

thin stratus Apr 15, 2018, 7:30 AM

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SpawnParams

twin juniper Apr 15, 2018, 7:30 AM

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yes

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I do

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right

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so it's null on remote clients

thin stratus Apr 15, 2018, 7:30 AM

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Can you double check, with a break point, that your PostInit actually has a valid Owner and Gun?

twin juniper Apr 15, 2018, 7:31 AM

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if (Role == ROLE_Authority)
{
FActorSpawnParameters SpawnParams;
SpawnParams.Owner = this;

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I think that's why it's null

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Gun = Cast<AGun_Ranged_Projectile>(GetOwner());

thin stratus Apr 15, 2018, 7:31 AM

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Not 100% sure right now. I would guess the owner replicates to the Clients if available

twin juniper Apr 15, 2018, 7:31 AM

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owner is null for remote clients

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ok

thin stratus Apr 15, 2018, 7:31 AM

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The Projectile is also marked as replicate?

twin juniper Apr 15, 2018, 7:31 AM

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yes

thin stratus Apr 15, 2018, 7:31 AM

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Hm

twin juniper Apr 15, 2018, 7:31 AM

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I mean I could easily replicate it

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I just thought it wasn't needed

thin stratus Apr 15, 2018, 7:32 AM

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I would say you pass the gun differently and spawn the actor deferred

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Or what ever that word is

twin juniper Apr 15, 2018, 7:32 AM

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The projectile deferred?

thin stratus Apr 15, 2018, 7:32 AM

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Yeah

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So Spawn, set an actual custom Gun Variable that is marked replicated, and the finish the spawning

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And leave the owner as a netconnection

twin juniper Apr 15, 2018, 7:32 AM

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I could do Projectile->SetGun(this); (when I spawn it)

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and replicate it

thin stratus Apr 15, 2018, 7:32 AM

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Well that's also okay

twin juniper Apr 15, 2018, 7:33 AM

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yeah alright

thin stratus Apr 15, 2018, 7:33 AM

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Just be aware that if the Projectile hits the wall direclty, the gun variable could still be null

twin juniper Apr 15, 2018, 7:33 AM

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Why did it stop crashing then when I commented the IF checks then?

thin stratus Apr 15, 2018, 7:33 AM

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No idea

twin juniper Apr 15, 2018, 7:33 AM

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If it's null, how did it even gets to PlayImpactEffects?

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that's weird... wasted so much hours into it. Thanks a lot man

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Just be aware that if the Projectile hits the wall direclty, the gun variable could still be null
What do you mean?

thin stratus Apr 15, 2018, 7:33 AM

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No biggie. Always debug C++ with VS callstack and variable list

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Yeah well replication takes time

twin juniper Apr 15, 2018, 7:34 AM

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oh, that's what you mean

thin stratus Apr 15, 2018, 7:34 AM

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If you do "SetGun" AFTER you spawn it (without the delayed spawning)

twin juniper Apr 15, 2018, 7:34 AM

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right, so what do I do in that case?

thin stratus Apr 15, 2018, 7:34 AM

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It could already have hit the wall

twin juniper Apr 15, 2018, 7:34 AM

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deferred?

thin stratus Apr 15, 2018, 7:34 AM

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I would use the delayed spawning

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Deferred or whatever it's called

twin juniper Apr 15, 2018, 7:34 AM

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yeah, that's the name. I'll use it. Thanks a lot again

thin stratus Apr 15, 2018, 7:34 AM

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I'm halfsure that it should replicate the variable with it when spawning the actor on the client

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Checking the gun pointer might still be worth it

hidden thorn Apr 15, 2018, 8:33 AM

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When I spawn an actor using a server RPC is there any way to do something with it when it arrives/spawns on client ??

thin stratus Apr 15, 2018, 8:34 AM

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BeginPlay, filtered for remote?

hidden thorn Apr 15, 2018, 8:34 AM

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I will explain my case, I am spawning some actors when I interact with an NPC,

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The method simply spawns some actors like so AItemBase* tempItem = GetWorld()->SpawnActor<AItemBase>(Item, spawnLocation, FRotator(0.0f, 0.0f, 0.0f), spawnParams);

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and then I do ```cpp
if (ensure(tempItem))
{
InventoryList.Add(tempItem);
// I thought of sending a client RPC here with the item info but the item is null
}

loud mountain Apr 15, 2018, 8:37 AM

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you made sure that AItemBase is replicated, so it spawns on clients and server

hidden thorn Apr 15, 2018, 8:38 AM

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yea

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It does spawn on the client

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but it obviously is a different item (id, pointer)

loud mountain Apr 15, 2018, 8:38 AM

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the above code runs after you spawned that item, right?

hidden thorn Apr 15, 2018, 8:38 AM

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yea

loud mountain Apr 15, 2018, 8:39 AM

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InventoryList is an array?

hidden thorn Apr 15, 2018, 8:39 AM

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void URPGPlayerInventory::SpawnItem(ANPC* NPC, TSubclassOf<AItemBase> Item)
{
    UE_LOG(LogTemp, Warning, TEXT("SpawnItem - RPGPlayerInventory"));

    FActorSpawnParameters spawnParams;
    spawnParams.Owner = Player;

    FVector spawnLocation = Player->GetTransform().GetLocation();

    AItemBase* tempItem = GetWorld()->SpawnActor<AItemBase>(Item, spawnLocation, FRotator(0.0f, 0.0f, 0.0f), spawnParams);

    if (ensure(tempItem))
    {
        InventoryList.Add(tempItem);
        Client_GiveNPCEquipmentID(NPC, tempItem->GetUniqueID());
    }
}

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This is what I was doing

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tempItem ID will return a different one from the one on the client

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and InventoryList is replicated

loud mountain Apr 15, 2018, 8:40 AM

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URPGPlayerInventory is some component I guess

hidden thorn Apr 15, 2018, 8:40 AM

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Yeah on the character

loud mountain Apr 15, 2018, 8:41 AM

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the actor spawns everywhere but the variable is null on clients, hmmpfh

hidden thorn Apr 15, 2018, 8:41 AM

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yea

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I guess it could be because it's too early

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and it didn't had time to spawn it on the client

loud mountain Apr 15, 2018, 8:43 AM

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is your component replicating?

hidden thorn Apr 15, 2018, 8:43 AM

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yeah

loud mountain Apr 15, 2018, 8:46 AM

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thinking

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you could try printing out strings to the console - one on begin play in item base and one on your client RPC

hidden thorn Apr 15, 2018, 8:50 AM

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That would work but the problem is that I can't change any values on the clients object before I spawn it

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What I was doing before was

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AItemBase* tempItem = GetWorld()->SpawnActor<AItemBase>(Item, spawnLocation, FRotator(0.0f, 0.0f, 0.0f), spawnParams);
tempItem->HideItem();

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Hide item would disable collision, set visibility to hidden etc

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It would work on the server but not on the clients

loud mountain Apr 15, 2018, 8:52 AM

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HideItem then would have to be NetMulticast so it executes on all clients

hidden thorn Apr 15, 2018, 8:52 AM

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Oh ok

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Hmm, do you have an idea of a how I could get this working...

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When I spawn an item I want to pass the UniqueID of the item to the NPC so it doesn't have to spawn it everytime it interacts with it by checking the ID of stored and the item that was spawned a while back.

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The problem is that when I pass tempItem->GetUniqueID(), that will be different from the one that was spawned on the client.

loud mountain Apr 15, 2018, 8:58 AM

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I never used UniqueID that way, but you may try to add "YourComponent->SetNetAdressable();" after you spawned it

hidden thorn Apr 15, 2018, 8:59 AM

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True bad use of UniqueID

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is there a version of SetNetAdressable for the actor I spawned?

loud mountain Apr 15, 2018, 9:03 AM

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hmm this is a actor component function, I dont know about actors

loud mountain Apr 15, 2018, 9:23 AM

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I've tried to recreate your function to some extent but It works fine on my side

hidden thorn Apr 15, 2018, 9:26 AM

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Can you send me the project so I don't have to re-create myself

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I could try a blank project but it might take some time

loud mountain Apr 15, 2018, 9:28 AM

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yeah just gimme a sec

hidden thorn Apr 15, 2018, 9:37 AM

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Thanks

untold sun Apr 15, 2018, 9:45 AM

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how is your experience replicating dynamically created components? for me it does not work - maybe because of using blueprint? I read about that SetIsReplicated needs to be set in the constructor of the component. Using blueprint I can only call that method after object creation.

hidden thorn Apr 15, 2018, 9:46 AM

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https://i.imgur.com/RBcEWDA.png

Imgur

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Enable Replicates

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and other things you might need

untold sun Apr 15, 2018, 9:47 AM

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I do that alreacy: I have replication on in the actor itself and set it at runtime on the created component. Anything else besides that?

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already

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the component is a simple particle system

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I look again on my code, probably I overlook something

thin stratus Apr 15, 2018, 11:01 AM

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Any idea what UT wins by doing this when incrementing deaths in the playerstate?

SetNetUpdateTime(FMath::Min(NetUpdateTime, GetWorld()->TimeSeconds + 0.3f * FMath::FRand()));

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Only place where they do that in the PlayerState.

fleet sluice Apr 15, 2018, 11:08 AM

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This doesn't technically answer your question, but if you knew how regular outrageous bugs have been in UT (and how outrageous they were), you'd incline to think this may simply be some leftover.

thin stratus Apr 15, 2018, 11:16 AM

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Fair enough

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I mean they call "HandleMatchHasEnded" twice

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¯_(ツ)_/¯

pallid mesa Apr 15, 2018, 12:15 PM

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SetNetUpdateTime(FMath::Min(NetUpdateTime, GetWorld()->TimeSeconds + 0.3f * FMath::FRand()));

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what? XD

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why are they 0.3... I mean, what's the context

halcyon abyss Apr 15, 2018, 12:18 PM

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Hey guys there is a bug with bOffsetPlayerGamepadIds

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it onl works for game input

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not UI input

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the bOffsetPlayerGamepadIds is a project setting named Skip Assigning Gamepad to Player 1

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I'm trying to understand how UI input is handled in the Viewport Game Client

thin stratus Apr 15, 2018, 12:20 PM

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Iirc, that is a setting added via PR to allow you to play with the first player as keyboard and second as GamePad.
Iirc it's mainly to allow easier testing, so you don't need two gampads

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Doubt it has any other use so far

halcyon abyss Apr 15, 2018, 12:20 PM

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I actually need this feature for my local multiplayer game

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and I'm changing this setting dynamically

thin stratus Apr 15, 2018, 12:20 PM

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Check #umg and ask Nick Darnell if he knows how to do that

halcyon abyss Apr 15, 2018, 12:21 PM

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Thank you 😃

sterile pebble Apr 15, 2018, 1:06 PM

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how Unreal will handle RPC with const and (or) parameter passed by reference?

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is this safe to do?

winter plover Apr 15, 2018, 1:13 PM

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Actor pointers get properly translated on the fly

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do you have any specific example of what you are trying to do?

twin juniper Apr 15, 2018, 2:11 PM

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Hey guys. Any chance to see the UnrealTournament code, or any tips, to get the idea how make any more complex stuff with custom CharacterMovement networking? I acquainted with tutorials but they are not enough.

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As far as I understand, character movement component handles the queue of movements in appropriate order on both client/server. It does it using compressed flags. No idea how to add more than 4 flags tough (8bit - 4 bits of reserved). Anyone?

slim holly Apr 15, 2018, 3:00 PM

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I really don't understand how the input queue would work

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relative movement queue maybe, but direct input queue doesn't make sense

twin juniper Apr 15, 2018, 3:36 PM

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I'm just not sure how to implement more complex character movement component, really. What if the character has more abilities than 4?

high nebula Apr 15, 2018, 4:15 PM

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I finally got the HUD working on the main window AND client1. Main window can damage client1, but client1 isnt damaging main window tho

winged badger Apr 15, 2018, 4:17 PM

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the clients input actions should be forwarded to the server

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and then the server should figure out what happened and replicate the results back to the client

high nebula Apr 15, 2018, 4:18 PM

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based on the twinstick base, the pawn spawns a projectile, and on event hit it applies damage to the other actor

winged badger Apr 15, 2018, 4:20 PM

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but the server's copy of your client's pawn needs to spawn a projectile in order to affect the server's world in any way

high nebula Apr 15, 2018, 4:22 PM

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The firing is in a function that has the spawn projectile node.. how do I make that happen on the server?

winged badger Apr 15, 2018, 4:23 PM

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you have an input action that fires

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from there send a server RPC

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and connect the firing logic to it

high nebula Apr 15, 2018, 4:25 PM

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like this?

📎 MPTest2.jpg

winged badger Apr 15, 2018, 4:25 PM

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what does the branch do?

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connect the input directly onto the ServerRPC

#

but otherwise, yes

high nebula Apr 15, 2018, 4:26 PM

#

theres an input node that determines the firing mode (different abilities), and that branch says if the pawn has enough mana to fire

winged badger Apr 15, 2018, 4:26 PM

#

that also needs to be checked by the server

high nebula Apr 15, 2018, 4:27 PM

#

it shows the pawn firing in my main window, but not in the client

winged badger Apr 15, 2018, 4:27 PM

#

ok, but now you have it working in the world that matters

#

now its a matter of either replicating the projectile

#

or simulating it on client

#

(it is not supposed to do damage, just provide a visual cue that you're firing when client)

high nebula Apr 15, 2018, 4:28 PM

#

k, turned on replicates for the projectile, solved that problem

#

now I'm getting a reference error in my mana spending node. but I think I know why that is

winged badger Apr 15, 2018, 4:29 PM

#

the reason why you want to check mana on server, not client

#

is because client player could, say turn on the cheat engine, find the mana variable's address, lock it at 100% and then fire forever

twin juniper Apr 15, 2018, 4:31 PM

#

have you guys ever seen this whole FetchResult (sync) bullshit

high nebula Apr 15, 2018, 4:31 PM

#

yeah. as for the reference error, I added a IsValid node. So it fails and ignores on the server client copy

twin juniper Apr 15, 2018, 4:31 PM

#

you have?

high nebula Apr 15, 2018, 4:31 PM

#

er no, previous conversation, sorry Bdoom

twin juniper Apr 15, 2018, 4:31 PM

#

oof

#

:<

high nebula Apr 15, 2018, 4:32 PM

#

Now to figure out why I'm not getting the mouse position on the client. he's firing towards world center instead of mouse position

#

ah, how do I get the proper controller on my pawn again?

#

ah, get controller

#

hm, that doesnt connect to "GetHitresult under cursor by channel"

winged badger Apr 15, 2018, 4:41 PM

#

you will have to send it thru the RPC

#

only client can get that information

#

so you add a vector input to ServerFire

high nebula Apr 15, 2018, 4:42 PM

#

I stored the hit result in a variable, and turned on replication

winged badger Apr 15, 2018, 4:42 PM

#

replication works only one way

#

server -> client

high nebula Apr 15, 2018, 4:42 PM

#

I thought I read RPCs couldnt take oh, they cant pass info back... whoops ok

winged badger Apr 15, 2018, 4:42 PM

#

only way to push info to server is a ServerRPC

high nebula Apr 15, 2018, 4:43 PM

#

yup! ok that works. awesome

#

I'm gonna be facing these issues with every. single. thing. i do. gonna take a while for it to click in 😦

#

Hm. I have a timer for mana regen. its on owning client only right now, I suppose that should be server only

slim holly Apr 15, 2018, 4:50 PM

#

yes, server handle stat changes

#

tho, like projectile spawning and such, you probably need to do it on both client and server

#

for the instant player feedback

#

but only server projectiles deal damage

#

net.pktlag is your friend when testing

high nebula Apr 15, 2018, 4:51 PM

#

ok, so I changed the function that fires the shot to multicast?

#

hm, client cant damage main window again

#

No sound with multicast or server only.

#

oh duhh. didnt set the sound file.

#

still cant damage main window tho

tall grove Apr 15, 2018, 5:04 PM

#

Hi , quick question : i want to do a f2p multiplayer game and i need to have DB to store things like x player bougth a skin . If there any service or plugin for backend to connect game logic?

twin juniper Apr 15, 2018, 5:10 PM

#

uhm

#

just use postgres

#

or some other sort of database

#

you can build your own plugins that can use native c++ sourcecode

#

im sure there is probably some sort of wrapper or binding for whatever database you want to use

high nebula Apr 15, 2018, 5:16 PM

#

K my client is firing the projectile on his end, but not on the server.

#

k,m changed from multicast back to server only and works. Also have Reliable ticked

twin juniper Apr 15, 2018, 5:30 PM

#

I'm not sure why but when I run my game without "Run with Dedi" server enabled

#

my char pawn won't rotate at all

#

like it just sits

#

rotated at 0,0,0

#

and wont move

#

D:

tall grove Apr 15, 2018, 6:11 PM

#

thanks

misty stirrup Apr 15, 2018, 6:11 PM

#

has something to do with how your logic is setup

#

id take a look at whatever rotates your characters

elfin shard Apr 15, 2018, 6:14 PM

#

Who can advise me a good Tutorial for a Multiplayer Blueprint? To host a game among friends, inserting only the IP and the Port

misty stirrup Apr 15, 2018, 6:45 PM

#

does anyone know how to replicate only the Vector and not the full transform? im trying to not do it in a janky way via blueprint tick

high nebula Apr 15, 2018, 8:01 PM

#

@twin juniper Any luck fixing that? I just added a skel mesh to mine and its not rotating either

twin juniper Apr 15, 2018, 8:01 PM

#

nopee

#

@high nebula you have the same thing?

high nebula Apr 15, 2018, 8:02 PM

#

mine rotates a little when I turned on Orient roation to movement

#

having other wierd issues. Camera on boom is facing the back of my player's head in the viewport. But ingame its facing the front

#

player wont even move in the right direction 🤔

#

wierd ok, now it works... but player still faces the wrong way

#

ah , ok, Orient to movement checked, unchecked use controller yaw on the character. now works.

#

mines top down tho, so need to rotate to movement

twin juniper Apr 15, 2018, 8:19 PM

#

@high nebula but in single player it works?

#

and what about with dedi server mode enabled

high nebula Apr 15, 2018, 8:20 PM

#

I havent tried dedicated, will try

#

yah, works on all

twin juniper Apr 15, 2018, 8:22 PM

#

it doesnt work for me

#

:(

high nebula Apr 15, 2018, 8:22 PM

#

the fact that it does for me is a miracle probably.

#

I'm not doing anything fancy with movement or rotation, just "add movement input" and then orient to movement enabled

twin juniper Apr 15, 2018, 8:23 PM

#

mhm

dull saddle Apr 15, 2018, 8:43 PM

#

Hey guys, I replicated all my events (crouch, sprint etc) but if the client moves to the left or right the whole player model and everything attached to it (e.g. weapon) gets a really annoying "fade" effect. Do you guys know how I can properly replicate the movement of my player?

#

If the host moves everything looks just fine

twin juniper Apr 15, 2018, 8:45 PM

#

Does this error sound familiar to anyone here?

#

Warning: Travel Failure: [InvalidURL]: Invalid URL:

#

[2018.04.15-20.36.40:384][570]LogNet: Browse: /Game/Maps/MyClientEntryMap
[2018.04.15-20.36.40:386][570]LogNet: Warning: Travel Failure: [InvalidURL]: Invalid URL: /Game/Maps/MyClientEntryMap
[2018.04.15-20.36.40:386][570]LogNet: TravelFailure: InvalidURL, Reason for Failure: 'Invalid URL: /Game/Maps/MyClientEntryMap'
[2018.04.15-20.36.40:386][570]LogNet: Warning: Travel Failure: [ClientTravelFailure]: Invalid URL: /Game/Maps/MyClientEntryMap
[2018.04.15-20.36.40:387][570]LogNet: TravelFailure: ClientTravelFailure, Reason for Failure: 'Invalid URL: /Game/Maps/MyClientEntryMap'

winged badger Apr 15, 2018, 8:53 PM

#

iirc you don't need a path for the level, just the name

twin juniper Apr 15, 2018, 8:58 PM

#

i think something could be messed up with the way my server registers to steam

thin stratus Apr 15, 2018, 9:22 PM

#

Please stick to english (:

azure slate Apr 15, 2018, 9:26 PM

#

Hey guys, I want to associate colors to players whenever a new one connect to the server, so far I figured out that I could use the players array in the gamemode, but now I'm trying to understand which blueprint should keep the value and how to display it to every player and make it so new players also see the colors of the players who joined previously

#

(by how to display it I mean how to replicate it)

high nebula Apr 15, 2018, 9:27 PM

#

from what I've read of Cedric's network compedium, it looks like playerstate will be your best bet

azure slate Apr 15, 2018, 9:27 PM

#

Yeah that's what I thought, do you have link of that btw?

high nebula Apr 15, 2018, 9:27 PM

#

yah http://cedric-neukirchen.net/2017/02/14/multiplayer-network-compendium/

Cedric Neukirchen

eXi

Multiplayer Network Compendium

azure slate Apr 15, 2018, 9:28 PM

#

Thanks 😃

high nebula Apr 15, 2018, 9:28 PM

#

np 😃 there's some other stuff in the pinned messages as well

azure slate Apr 15, 2018, 9:29 PM

#

Thanks!

high nebula Apr 15, 2018, 9:36 PM

#

While I'm thinking of it, when I start doing AI, is there special stuff to be done to get the AI networked properly?

winged badger Apr 15, 2018, 9:38 PM

#

you just need to know one thing for it

#

AI doesn't exist on clients

high nebula Apr 15, 2018, 9:39 PM

#

ok, so server spawns the AI pawn/controller/behaviour tree. everything they do will automatically be on the server?

#

then I just replicate a pawn to show up on client?

winged badger Apr 15, 2018, 9:40 PM

#

exactly

high nebula Apr 15, 2018, 9:40 PM

#

ok good. all the RPC push to server/ check if this is the client copy, etc is annoying :p

twin juniper Apr 15, 2018, 9:44 PM

#

d_____d

#

so the rotation of my pawn

#

works in dedi servers

#

but not listen server

#

but if i add a second player it works fine

#

im just trying to make it rotate to wherever my camera is

#

D:

thin stratus Apr 15, 2018, 9:55 PM

#

If you want help, you'd need to post your code

high nebula Apr 15, 2018, 10:05 PM

#

My AI is going to have different guilds they belong to, different tasks, set in the AI controller? to be able to access by player and other NPCs?

#

so if NPC1 meets NPC2, same guild, leave alone., different guild, attack.

thin stratus Apr 15, 2018, 10:12 PM

#

You can give your AIControllers PlayerStates

#

It's a boolean that's only available in c++ though

#

Then you can easily save that info similar to how you save Playerinfo

#

IF wanted

high nebula Apr 15, 2018, 10:13 PM

#

easy is good, c++ is bad 😐

thin stratus Apr 15, 2018, 10:13 PM

#

You you'd only need to make an AIController in C++

#

Set that boolean to true in the contructor

#

And Inherit from it

#

That's all

#

:D You can't dodge c++ forever

#

It's bad to do so

high nebula Apr 15, 2018, 10:14 PM

#

I can try!

grand kestrel Apr 15, 2018, 10:16 PM

#

C++ is easy after a while though

high nebula Apr 15, 2018, 10:21 PM

#

so is avoiding it 😄

winter plover Apr 15, 2018, 10:22 PM

#

not really

#

sooner or later you will run into a brick wall

thin stratus Apr 15, 2018, 10:22 PM

#

Sooner than later :D

high nebula Apr 15, 2018, 10:23 PM

#

I abandon projects for other reasons long before I hit any walls 😃

winter plover Apr 15, 2018, 10:23 PM

#

C++ might be a bit intimidating at first, but it makes stuff generally easier to do

#

even if it seems less intuitive than BP

#

BP stops being intuitive after your code grows over a certain size

high nebula Apr 15, 2018, 10:24 PM

#

all hail the flying spaghetti monster 😃

azure slate Apr 15, 2018, 10:27 PM

#

@thin stratus Thanks for the amazing compendium, I finally figured out how to do this player color thing

#

📎 unknown.png

high nebula Apr 15, 2018, 10:28 PM

#

nice 😄

azure slate Apr 15, 2018, 10:31 PM

#

@high nebula Thanks for the heads up 😃

high nebula Apr 15, 2018, 10:31 PM

#

ey, @thin stratus is the one that wrote it 😄

azure slate Apr 15, 2018, 10:33 PM

#

Yeah but I wouldn't know about the doc without you, you did your part plus the playerstate was actually the correct answer

high nebula Apr 15, 2018, 10:35 PM

#

oh, sweet 😄

sharp spire Apr 15, 2018, 10:53 PM

#

Very nice @azure slate 😃

azure slate Apr 15, 2018, 10:59 PM

#

@sharp spire Thanks! Now I need to make the cannons work 😃

icy nacelle Apr 16, 2018, 12:04 AM

#

Quick question... if I use Apply Damage, do I have to run it on server, or does it do it automatically? The tooltip says "This function will only execute on server", I was wondering if it does this itself?

azure slate Apr 16, 2018, 12:04 AM

#

I believe it will do it if your component is replicated

#

So I'm not sure how to approach this, I have an aiming system that uses the rotation of my camera to know whether to aim on the left or the right of the boat. I don't want the camera position to be replicated for obvious reasons (and I'm using the input events but instead get mouse X/Y), so I tried sending on a Server RPC only the Yaw rotation and then use that variable replicated for the aiming system but couldn't make it work. The server receives 0 instead of the expected rotation. What would be the best way to know the camera position without replicating its position?

#

📎 unknown.png

grand kestrel Apr 16, 2018, 12:14 AM

#

Is your boat a pawn? Use Get Base Aim Rotation

#

Already replicated just use as is

azure slate Apr 16, 2018, 12:16 AM

#

It's a pawn but the camera is an orbit camera, I just want to know whether it's looking to the right or the left

grand kestrel Apr 16, 2018, 12:18 AM

#

Ok that doesn't change anything did you at least try it

azure slate Apr 16, 2018, 12:20 AM

#

I just did same issue :/

#

The function that checks the position is also run on server

grand kestrel Apr 16, 2018, 12:25 AM

#

It's already replicated, don't send an RPC

#

Use that node, not your float

azure slate Apr 16, 2018, 12:28 AM

#

Yeah that's what I did

#

I used it on the aiming function

grand kestrel Apr 16, 2018, 12:28 AM

#

Are you setting camera rotation through control rotation?

azure slate Apr 16, 2018, 12:29 AM

#

I'm using AddWorldRotation and AddRelativeRotation

bleak cloud Apr 16, 2018, 12:37 AM

#

In blueprints, if I spawn an actor and set the owner to the player controller, when I try to getOwner later, it's returning null.. Anyone have any suggestions what I'm doing wrong?

#

This is in a run on server event. My guess is the owner is not replicated to the server?

fossil spoke Apr 16, 2018, 12:40 AM

#

@azure slate The PCM exists for every PlayerController on the Server as well

#

The PCM holds the Location and Rotation of the Camera

#

@bleak cloud You should set the Owner on the Server.

azure slate Apr 16, 2018, 12:41 AM

#

@fossil spoke What does PCM stands for?

fossil spoke Apr 16, 2018, 12:41 AM

#

PlayerCameraManager

#

It exists on the PlayerController

azure slate Apr 16, 2018, 12:43 AM

#

And does it work with the AddRotation nodes or should I use something else?

fossil spoke Apr 16, 2018, 12:44 AM

#

No im just saying you dont need to send your Cameras Transform to the Server as the Server (via the PCM) already has relatively accurate Location/Rotation information on it.

bleak cloud Apr 16, 2018, 12:44 AM

#

@fossil spoke If I'm doing this from the event BeginPlay, should I have a switch has a authority on there?

fossil spoke Apr 16, 2018, 12:45 AM

#

You will want to update the Owner for both the Client and Server so having no SwitchHasAuthority would be best.

grand kestrel Apr 16, 2018, 12:45 AM

#

Owner is replicated

fossil spoke Apr 16, 2018, 12:45 AM

#

When you Spawn the Actor you should be setting the Owner on the SpawnActor node.

grand kestrel Apr 16, 2018, 12:46 AM

#

So long as the actor itself replicates

fossil spoke Apr 16, 2018, 12:46 AM

#

Ohhh also @bleak cloud If your setting the Owner to an PlayerController and then trying to access the Owner from ANOTHER client then it will be NULL because Clients only have their own PC

bleak cloud Apr 16, 2018, 12:47 AM

#

Whats the preferred method of uploading blueprint screenshots on here? Just drag and drop or upload to a third party site?

grand kestrel Apr 16, 2018, 12:47 AM

#

ShareX

fossil spoke Apr 16, 2018, 12:47 AM

#

Screenies are ok, there is an website that can render an BP Graph but i dunno what its called

azure slate Apr 16, 2018, 12:47 AM

#

@fossil spoke Still returns 0 do I have to tell the camera manager which camera to use or something like that?

fossil spoke Apr 16, 2018, 12:48 AM

#

No, the PCM always uses the currently active camera

grand kestrel Apr 16, 2018, 12:48 AM

#

You're doing something wrong

#

If you keep getting 0

azure slate Apr 16, 2018, 12:48 AM

#

Yeah that's why I'm asking for help

grand kestrel Apr 16, 2018, 12:48 AM

#

But you're not supplying enough info

azure slate Apr 16, 2018, 12:49 AM

#

Here's the graph it's called on server

📎 unknown.png

sharp spire Apr 16, 2018, 12:49 AM

#

uh.. running into quite an issue out of no where...

fossil spoke Apr 16, 2018, 12:49 AM

#

You cant access another Players PCM (Because of what i explained to @bleak cloud where the PC only exists for your own Client)

sharp spire Apr 16, 2018, 12:49 AM

#

i've done nothing to my project, and when loading it up today my characters stutter on the clients...

fossil spoke Apr 16, 2018, 12:50 AM

#

@azure slate Are you sure its being called on the server, also what exactly is the issue?

grand kestrel Apr 16, 2018, 12:50 AM

#

Just use control rotation to rotate your camera so you can use base aim rotation

bleak cloud Apr 16, 2018, 12:50 AM

#

📎 PC_Game.PNG

#

📎 TestCharacter.PNG

#

📎 BP_TestWeapon.PNG

#

First one is the player controller, second is the character, third is the weapon

fossil spoke Apr 16, 2018, 12:51 AM

#

@bleak cloud What class is that first screenshot in?

#

Ok so your PC is spawning the Character?

bleak cloud Apr 16, 2018, 12:52 AM

#

Yes

fossil spoke Apr 16, 2018, 12:52 AM

#

Right well id put an HasAuth node there

#

The Server should only be spawning it.

#

Same for the Weapon

#

Also the Weapon should be Owned by the Character, not the PC

#

Dont pass down the Owner

bleak cloud Apr 16, 2018, 12:53 AM

#

Whats the purpose of instigator?

fossil spoke Apr 16, 2018, 12:54 AM

#

Instigator is handy for determining what was responsible for an event

bleak cloud Apr 16, 2018, 12:54 AM

#

Which in this case would be the same as owner

fossil spoke Apr 16, 2018, 12:54 AM

#

Instigator on an Projectile would be the Weapon

#

Yes

#

Owner and Instigator can be the same.

#

Sometimes it shouldnt

azure slate Apr 16, 2018, 12:55 AM

#

@fossil spoke Yes the print string are printed with a Server prefix, my issue is that I have an aim system that check the camera rotation and choose whether to put a target on the right or the left depending on the yaw value. I'm using this to determine if the shot is going to be fired towards the left or right side so I need this value to be replicated otherwise it will always fire on the same side. I can't just change the camera rotation on server and replicate it because obviously I want the camera to be smooth so that's why I was trying to send over the angle via an RPC on server but didn't manage to make it work either. So far the only solution I found is to run the code that update the camera twice, once on the replicated server actor and once on the owning client without replicating the camera. But obviously I'm pretty sure there is an easier way to do this

bleak cloud Apr 16, 2018, 12:56 AM

#

So then in my fire function, I want to get the clients camera rotation for spawning the projectile (Unless theres a better way to do this), Do I need to make a loop that goes up the owning chain until it can successfully cast to the player controller?

fossil spoke Apr 16, 2018, 12:56 AM

#

@azure slate When you say Target? What does that mean exactly, is it like an UI element or something?

#

@bleak cloud Spawn the Projectile on the Server as well, you should always be spawning authoritative actors

azure slate Apr 16, 2018, 12:57 AM

#

Just a plane like that

📎 unknown.png

bleak cloud Apr 16, 2018, 12:59 AM

#

@fossil spoke The issue I ran into with that, was it was using the rotation of the listen server instead of the owning client

#

Do I need to just manually pass in the rotation when the user input is fired?

fossil spoke Apr 16, 2018, 12:59 AM

#

Sure

bleak cloud Apr 16, 2018, 1:00 AM

#

I feel like getting the transform information should be something done on the server though, to prevent any bamboozles

fossil spoke Apr 16, 2018, 1:01 AM

#

The issue you get is that the Client will be infront of the server from their perspective

#

The PCM and the PC all have the relevant info you need Server Side

bleak cloud Apr 16, 2018, 1:03 AM

#

How should I be getting the proper PCM server side? Get owner -> get pcm?

fossil spoke Apr 16, 2018, 1:03 AM

#

If the Owner is the PlayerController that could work but i wouldnt rely on that.

#

If you have the Clients Character, you can access their PC, thus you have access to their PCM

bleak cloud Apr 16, 2018, 1:05 AM

#

And I'm assuming using getOwner to get the character is ok?

fossil spoke Apr 16, 2018, 1:06 AM

#

Sure i guess if you know thats what your going to always have.

bleak cloud Apr 16, 2018, 1:06 AM

#

What other options are there? Sorry if these are silly questions, still trying to figure out UE4

#

It worked either way. Thank you for the help!

azure slate Apr 16, 2018, 1:15 AM

#

This is supposed to run only on the server right?

📎 unknown.png

#

📎 unknown.png

#

📎 unknown.png

#

📎 unknown.png

#

(input event is triggered by a right click)

fossil spoke Apr 16, 2018, 1:34 AM

#

Yeah but ToggleAim never sets the value for CurrentCameraAngle....

grand kestrel Apr 16, 2018, 1:34 AM

#

Still don't get why you'd want to replicate the camera angle.. which is already replicated and in a much more optimized manner.. if you just use set control rotation / inherit control rotation on camera / get base aim rotation for the value

fossil spoke Apr 16, 2018, 1:34 AM

#

^^

grand kestrel Apr 16, 2018, 1:35 AM

#

You can also do Add Control Rotation on the controller if you want something closer to add rotation

#

Instead of set control rotation from pawn

azure slate Apr 16, 2018, 1:38 AM

#

It's the same pawn why would it need to be set on toggle aim as well? I'll do what you suggested @grand kestrel but clearly there is something that I don't understand with replication and I'd like to know what before doing something else

grand kestrel Apr 16, 2018, 1:39 AM

#

You don't set it

fossil spoke Apr 16, 2018, 1:39 AM

#

Where is UpdateCameraAngle called from?

grand kestrel Apr 16, 2018, 1:39 AM

#

It's already done for you

azure slate Apr 16, 2018, 1:40 AM

#

The ontick of the pawn

#

@grand kestrel yeah I got that I was responding to devils

severe widget Apr 16, 2018, 1:46 AM

#

I'm confused as to wht you're confused about

azure slate Apr 16, 2018, 1:53 AM

#

I just want to replicate a camera angle without it having its value set by the server. So a copy of an angle if you will

sharp spire Apr 16, 2018, 3:43 AM

#

Question: can savegame be used in multiplayer if cheating isn’t an issue?

#

And another question, can listen server hosts be transferred to another client?

#

Migrating hosts basically

sharp spire Apr 16, 2018, 4:07 AM

#

Googles results are saying no

#

Different question: what is the general workflow for saving character information on a dedicated server ?

#

Are the saved files stored on the dedicated machine and accessed with permission by the client?

#

I understand how to make a login system reading UE savegame files with passwords, but is that the best way?

fossil spoke Apr 16, 2018, 4:24 AM

#

Generally Player Persistent Data is sent/received by a Database somewhere

slim holly Apr 16, 2018, 6:50 AM

#

can you do steam cloud saving without ever handling local files?

#

I guess you could get away with hash check to make tampering save files hard

bitter oriole Apr 16, 2018, 7:01 AM

#

You can probably look into that using the Steam API directly

#

But generally speaking you can't prevent modification of saves

#

@sharp spire If you're doing a MMO-style game with online saves, then you need a data server to that purpose. Dedicated servers connect to the data server and save the player progress.

#

You can't have any data coming directly from the client, since it's very easy to intercept, change, or directly send false data

twin juniper Apr 16, 2018, 11:39 AM

#

also

#

I have yet to see unreal handle more than 100 players

bitter oriole Apr 16, 2018, 11:49 AM

#

Which isn't really an issue

#

Both because MMO-style games can work with 20 players on a level like Destiny or Sea of Thieves, and because extremely few indie game can get 100 players at the same time anyway

#

Basically, 1% of players online is a good approximation of what a successful AAA title brings in

#

If you're planning for 250 players on your indie game with less retention options, that'd take 50,000 sales

#

Which is a solid 50 times what an indie title is likely to sell today

summer nova Apr 16, 2018, 12:01 PM

#

thats why my next game is coop for 3 players

#

designed so you bring friends or similar

#

and even if i do matchmaking, finding 2 extra randoms is very easy

bitter oriole Apr 16, 2018, 12:40 PM

#

By the way, does anyone know what happens if you start your Steam-achievements-enabled game without Steam ?

#

Will achievements just fail, are they stored ?

summer nova Apr 16, 2018, 12:47 PM

#

@bitter oriole depends on your implementation

#

if you use online subsystem and its not steam, Online Subsystem Null gets opened

#

if you do achievements there, i think nothing happens

bitter oriole Apr 16, 2018, 12:48 PM

#

Yeah okay

plain flume Apr 16, 2018, 1:49 PM

#

Hello. Has there been some change or something. I remember reading, that when using the RepNotify, the function only runs on clients. Now that I have been testing and using. It seems that server will run the function also when the replicated value is changed..

#

Or has it always been that way? I remember Tom Loomans tutorials where he always runs functions again as server, because he says function isn't run on server but needs to launch seperately

summer nova Apr 16, 2018, 2:15 PM

#

@thin stratus im having BeginPlay not really getting called on clients, do you know an alternative?

#

object gets spawn-d in server, client doesnt get a beginplay

thin stratus Apr 16, 2018, 2:15 PM

#

That is weird

#

Are you sure you aren't doing any bad things in C++?

#

Like not calling super or so?

#

Also, own question: Does anyone know how to get the actual Subsystem and not just IOnlineSubsystem ?

#

Had to basically recreate the Oculus Message Handler so I can get messages cause I can call their own Delegate functions cause I can't get a hold of the actual FOnlineSubsystemOculus

summer nova Apr 16, 2018, 2:18 PM

#

man, the multiplayer is complicating this game so damn much

#

VR + multiplayer + rng rooms and stuff is a killer combination

#

but its my main selling point after all...

sharp spire Apr 16, 2018, 2:46 PM

#

@bitter oriole thank you so much that helped 😃

#

How would a game like clash royals work in UE? They seem like listen servers, but are they actually connected to a dedicated server somewhere?
also how does Lineage 2 get away with making an mmo that style? Multiple servers for each region?

bitter oriole Apr 16, 2018, 2:52 PM

#

Dunno about these games, but classic MMOs with high player counts on the same instances work fairly differently than UE4, which is geared toward traditional multiplayer games.

#

The UE4 network model is one of equality - server & client run the same code with different permissions, and UE4 games are usually fairly high-end, making high player count a potential performance issue

#

The typical UE4 way would be smaller instance servers with like 20 or 30 players, which in turn connect to a master data server

sharp spire Apr 16, 2018, 3:35 PM

#

Well lineage 2 is made in unreal engine and supports tons of players, so they must have smaller instances with 20-30 players and connect like you said. But what exactly would he master data server be? Would it just be data sent from the server to store character information?

thin stratus Apr 16, 2018, 3:36 PM

#

Unreal Engine 2.5

#

You can't compare that

#

It's not the default engine

#

Neither is it UE4

#

They heavily modified the Engine

#

UE4, by default, doesn't support more than 100 Players per Server. maybe a bit more, but most is limited to what Epic managed to get with Fortnite

#

After that you have to get your own ServerBackend to do all the Replication etc.

sharp spire Apr 16, 2018, 3:37 PM

#

I was thinking about 50 players with a couple of servers to start. Would that be fine?

#

Could I also have a master database with character info shared between servers?

summer nova Apr 16, 2018, 3:37 PM

#

database is outside of a game server

sharp spire Apr 16, 2018, 3:37 PM

#

Not shared live

#

But logging into another server.

thin stratus Apr 16, 2018, 3:37 PM

#

Yes, as said, starting 4.19/4.20 UE4 has the new stuff from Fortnite

sharp spire Apr 16, 2018, 3:37 PM

#

Ah so yes?

summer nova Apr 16, 2018, 3:37 PM

#

50 players in a server is 100% possible and not hard to do with default unreal replication

thin stratus Apr 16, 2018, 3:37 PM

#

And Database is up to you

#

That's not UE4 relevant

summer nova Apr 16, 2018, 3:38 PM

#

i mean, look at Arc, Conan, Pubg

#

all using default unreal netcode

thin stratus Apr 16, 2018, 3:38 PM

#

PUBG runs quite bad

#

:D

sharp spire Apr 16, 2018, 3:38 PM

#

I didn’t know PUBG was unreal haha

thin stratus Apr 16, 2018, 3:38 PM

#

And even they modified the Engine

sharp spire Apr 16, 2018, 3:39 PM

#

So what I want to accomplish, is multple serves running the same game but with different players and allowing them to switch freely (reloading is fine). Also can I host multiple servers with different ports on the same machine and support 50+ players on each ? Let’s say 5 servers

thin stratus Apr 16, 2018, 3:41 PM

#

Different Ports Yes
50+ Player on each Server Yes
Multiple DediServers per Server Yes, but keep in mind that this is hardware specific and game specific

bitter oriole Apr 16, 2018, 3:52 PM

#

@sharp spire I have to say it again because this is very relevant unless you're working at a large-ish company, even though I sound like an ass

#

But planning for high player counts as part of the game design is a bad idea for an indie game, imho

#

It's part of the technical considerations

#

Like, Divinity Original Sin which is a very successful game and sold a million copies has a lifetime average of 1,000 online players, you can scale it down for your own game based on sales expectation

sharp spire Apr 16, 2018, 4:09 PM

#

Right right, you don’t sound like an ass at all. There are plenty of people who cannot seem to word things right without sounding like an ass, and you’re not one of them lol. But you’re very right, my only concern is I plan on releasing on iPhone and POSSIBLY android. I’m buying my developer account for testing purposes today or tomorrow as it’s only 99$. But I’d imagine a large amount of players would try playing at some point right?

#

I was considering opening up a couple small dedicated servers and allowing for a listen host option that isn’t connected to the dedicated server player database to allow players to continue playing if the servers are full (in the beginning of release) but I may still be ahead of myself with that assumption

#

I’m very open to the truth, but I’m also one who doesn’t give up no matter how much work is involved

twin juniper Apr 16, 2018, 4:19 PM

#

Anyone know why rotation on my single player mode would not work but works with dedi server checked? And if I turn on (2) players the server wont rotate, but the client will?

#

Anyone had this before D:

#

its really annoying me

#

and its the only thing stopping me from having a single player mode for my game

bitter oriole Apr 16, 2018, 4:20 PM

#

@sharp spire I don't know much of the mobile market but my guess would be that it's a very competitive one where successful titles rake in millions of downloads, and most titles get a hundred downloads. It's fairly random and part of why developers tend to go with small games on mobile - it's hard to jsutify working years on something that might get ignored. But I'm a PC person myself, so I might be in the wrong here

#

What I'm saying is, be sure to have a plan if your game has 3 online players rather than 300.

misty stirrup Apr 16, 2018, 4:59 PM

#

Does anyone know if characters are destroyed client side if they’re no longer net relevant

sharp spire Apr 16, 2018, 6:12 PM

#

I’ve always been a PC guy myself, but with the advancement in mobile technology I feel it may be time to start opening some doors in the field. The type of game I’m making is very “user-created” so it doesn’t take much on my end to make the game an enjoyable and long experience without taking years for me to develop. And I’ve already created a lot of my assets that can be interchanged between my projects because none of them have been released yet lol. That’s off discussion though, maybe what I need to do is focus on listen server development and let the players decide after it’s released if there should be dedicated aswell

#

Basically to see if there are even players to decide.. lol. But I’ve played so many RPGs and created a few off-brand servers of some games and had a huge amount of player interest. So I think recreating those game types and adding what players suggested in the past might bring some light to the end of my tunnel lol

#

also does UE4 support dedicated servers on mobile devices? does a computer run these servers ?

bitter oriole Apr 16, 2018, 6:41 PM

#

@rancid idol You'd want a regular online server for mobile

sharp spire Apr 16, 2018, 6:56 PM

#

So an iOS device of some sort doesn’t have to be the server right?.. haha. A simple PC server would work? I have so much research, sorry if this isn’t your field lol. Don’t feel obligated. I’m sure it’s a very straightforward process

bitter oriole Apr 16, 2018, 6:57 PM

#

Yeah, regular server on a virtual server like you'd do for PC

#

Rent a VPS for a few bucks a month etc

sharp spire Apr 16, 2018, 6:58 PM

#

Right right, or port forward my own pc for testing purposes should work right?

bitter oriole Apr 16, 2018, 6:59 PM

#

Sure

sharp spire Apr 16, 2018, 6:59 PM

#

Does that make it cross compatible with a few settings set right? Or is the subsystem stopping that from happening by default

#

Android to iPhone servers

bitter oriole Apr 16, 2018, 7:01 PM

#

No idea 😉

sharp spire Apr 16, 2018, 7:02 PM

#

Fair enough 😃 I can’t imagine it is, most games find it hard to implement. And I haven’t heard of any cross compatible ue games

meager spade Apr 16, 2018, 7:38 PM

#

i tried adding in the GameSparks module, but i can't seem to get the header files to be found

#

nvm, restarted pc, and it worked

twin juniper Apr 16, 2018, 8:00 PM

#

Where would the best place to implement a hitmarker event be? (visual notification that a shot landed)

#

Doing it in the gun works but the final shot that kills the enemy doesn't cause a hitmarker to be called as his health is 0

#

Doing it in the character works but then you don't get the bone name to play a special hitmarker if a headshot was hit

#

More importantly, I'd like there to be some artificial delay if you are not playing online, so that there is a bit of spacing between the shot and the hit, even at 0ms ping

#

So that introduced timers which I couldn't get to pass through parameters, which meant I had to make 3 separate hitmarker functions (regular hit, headshot hit, and death hit) and now things are pretty messy

hasty adder Apr 16, 2018, 8:04 PM

#

I like to put events in PlayerState. To call its own pc to call a umg. So you can on hit in say a bullet call the event on ps. With th data it needs to make a umg appear

twin juniper Apr 16, 2018, 8:05 PM

#

@hasty adder That still has the problem of not having bone names (unless you pass it directly), and either will trigger hitmarkers on dead bodies, or else the final killing hit won't trigger any hitmarker

#

Which is why I had to split them up so that the killing hitmarker is done in the character and the other ones are done from the weapon

#

But they all just call a client event on the PlayerController which then calls an event on the HUD which calls it on the widget

hasty adder Apr 16, 2018, 8:06 PM

#

Hmm wonder if I know what you mean by hit marker. Visual@example?

twin juniper Apr 16, 2018, 8:07 PM

#

https://youtu.be/L9YozBG3MuA

YouTube

Dakine US

WHAT IS HITMARKER???

▶ Play video

#

@twin juniper It depends how you're calling the rotation?

#

A confirmed hit from the server

#

It is trivial to implement if you just let the server call a generic hitmarker on each hit, but with an artificial delay (timer) and different hitmarkers for different bones, it gets harder to keep track of

#

@twin juniper im not doing anything special

#

lol

#

no but what are you doing

#

its using the same stuff basically

#

nothing

#

absolutely nothing

#

I can't help you debug unless you're not letting me know what logic you're doing :b

hasty adder Apr 16, 2018, 8:10 PM

#

Maybe something on damaged sent a call back to the damage caused?

twin juniper Apr 16, 2018, 8:11 PM

#

That's what I have for the death hitmarker but I don't send specific hit info like bone names when causing damage

#

So it is a confirmed hit, but no info on whether it's a headshot or not, and that actually does seem to make the difference in terms of what sounds and visuals play

#

i am doing nothing

#

Actually all good I think I figured it out

#

Thanks @hasty adder

#

its using third person template settings

#

that i never really changed

#

from a year ago

hasty adder Apr 16, 2018, 8:13 PM

#

😃

#

Use controller rotation on pawn?

twin juniper Apr 16, 2018, 8:21 PM

#

@hasty adder you talking to me?

#

this issue only occurs

#

on listen servers

#

but not clients

hasty adder Apr 16, 2018, 8:24 PM

#

You use player controller 0 ? I believe if your testing local it will be consumed by one of the clients

#

And listen is -1

meager spade Apr 16, 2018, 8:24 PM

#

@twin juniper when a hit gets registered on the enemy/player, show the hitmark before you kill them/take health away.

twin juniper Apr 16, 2018, 8:25 PM

#

@meager spade working on that now, hadn't used delegates to call timers so I thought it wasn't possible to call functions from timers with arguments

meager spade Apr 16, 2018, 8:25 PM

#

that is how i did it, and i don't use delegates etc for it

twin juniper Apr 16, 2018, 8:25 PM

#

Even with an artificial delay?

#

I want say 200ms before applying the damage / hitmarker

#

On a local client

#

Maybe not 200ms but a certain delay to space out the shot and the hitmarker

meager spade Apr 16, 2018, 8:26 PM

#

ah then yeah you need to use a timer for that, or check to see if a hitmark is already displayed to avoid showing another, what kind of hitmark you talking about?

twin juniper Apr 16, 2018, 8:27 PM

#

I want a hitmarker for each shot

#

So there has to be a new one

#

It's very quick but has to click and show a moving mark for each hit

#

@hasty adder no where in my code do i directly set rotation of pawn

#

its all handled by the default settings in unreal

#

from 3rd person template

meager spade Apr 16, 2018, 8:35 PM

#

@twin juniper i remember moving it to the raycast for my instant weapons,

#

    {
        SpawnImpactEffects(Impact);
        SpawnTrailEffects(Impact.ImpactPoint);
    }
    else
    {
        SpawnTrailEffects(EndTrace);
    }```

#

SpawnImpactEffects is the hitmarker when i hit someone

twin juniper Apr 16, 2018, 8:36 PM

#

That actually makes way more sense

#

Then I just have to delay the damage event itself

#

And the hitmarker will automatically be delayed

#

Thanks a lot

hasty adder Apr 16, 2018, 8:45 PM

#

If I recall@default 3rd person template is set to orient rotation by velocity until you check the box use controller rotation in the springs arm for the camera

#

📎 image.png

#

But yeah weirdnit only affects the listen

#

Makes me wonder if that is called somewhere and it’s not for listen

#

A authority switch or something

twin juniper Apr 16, 2018, 8:58 PM

#

@hasty adder yes, it is very weird!

hidden thorn Apr 16, 2018, 9:12 PM

#

If I have a multicast rpc on an actor I don't own but I set the owner to be myself, can I call it inside a server rpc on my character ?

sweet spire Apr 16, 2018, 9:12 PM

#

I dont think so? That sounds like a recipie for disastee

hidden thorn Apr 16, 2018, 9:13 PM

#

Oh ok, I just wanted to check

sweet spire Apr 16, 2018, 9:15 PM

#

I cant say for 100% it does not work, but u prob wann take a look at your framework as that sounds messy

hasty adder Apr 16, 2018, 9:17 PM

#

@twin juniper so same problem in our with no dedicated and just one client?

twin juniper Apr 16, 2018, 9:18 PM

#

the one client

#

works

hasty adder Apr 16, 2018, 9:29 PM

#

Standalone works then?

neon mango Apr 16, 2018, 10:16 PM

#

I have a question regarding these settings. https://gyazo.com/a300acc730064523b9183e5873e6deef Would it potentially be wise to alter these values for moments where I know the player is going to be moving faster than usual? And then revert them back ? Like if the player could run super fast, I tweak those values then when they walk I revert. Or is that not needed and I should just find values that work with all speeds?

Gyazo

twin juniper Apr 16, 2018, 10:17 PM

#

@hasty adder i think it all doesnt work if not a client

hidden thorn Apr 16, 2018, 10:45 PM

#

With OnRep Notify, if a replicated variable is false and then I do variable = false; OnRep_Example, this won't work as the value hasn't changed, but if I do variable = true, OnRep_Example this will work and take effect.

#

Just want to confirm

winged badger Apr 16, 2018, 10:46 PM

#

as in you tested it and it works that way, or you want confirmation that it works that way?

hidden thorn Apr 16, 2018, 10:54 PM

#

I tested it and it worked liked that

#

in my case and I want to be 100% sure

winged badger Apr 16, 2018, 10:59 PM

#

something like if (myVar == value) return; makes sense

#

pretty common if you don't want to execute a setter if the value hasn't changed

hidden thorn Apr 16, 2018, 11:01 PM

#

This is what I did

#

//.h
UPROPERTY(EditAnywhere, BlueprintReadWrite, ReplicatedUsing = OnRep_ItemVisibility, Category = Item)
bool bShowItem;

UFUNCTION()
void OnRep_ItemVisibility();

//.cpp
tempItem->bShowItem = false;
tempItem->OnRep_ItemVisibility();

#

by default bShowItem is false

#

and nothing changed

#

after I put into the constructor bShowItem = true it worked

#

so I assume unless there is a change to the value the OnRep won't be executed

winged badger Apr 16, 2018, 11:02 PM

#

i always assumed as much

#

anything else would be a waste of bandwidth 😄

#

now wondering about BP RepNotify.... hmmm

#

never trust BP

fringe dove Apr 17, 2018, 1:29 AM

#

is order guaranteed between a reliable to client RPC and a reliable multicast RPC as long as they go over the same actor channel?

#

or are singlecast/multicast separate with respect to ordering

dim eagle Apr 17, 2018, 1:45 AM

#

Hi, I was wondering how you can have a player that is server pass the server or role AUTHORITY to another player? This would be needed if say the hosting person crashed or had to leave

misty stirrup Apr 17, 2018, 3:20 AM

#

@fossil spoke hey man, i have a question for you. do you know what exactly is happening when a player is outside of the net relavancy cull squared thing? is it destroying the actor clientside, no longer replicating it, then recreating it clientside when it is relevant again? from my testing it seems that's what's going on. but it seems like it's only doing it for Character. i also can't find where in the code it's doing this either, ive been digging around the git for the past few days finding nothing

fossil spoke Apr 17, 2018, 3:26 AM

#

@misty stirrup https://docs.unrealengine.com/en-us/Gameplay/Networking/Actors

#

You may find more information on Actor Replication and Net Relevancy in the documentation

#

As for exactly where in Code relevancy is managed you can try looking at AActor::IsNetRelevantFor() and AActor::GetNetPriority()

misty stirrup Apr 17, 2018, 3:34 AM

#

this is the thing that's messing with me though

#

i can't seem what's hiding the ACharacter when it's no longer relevant for the client

fossil spoke Apr 17, 2018, 3:35 AM

#

You cant find the settings?

misty stirrup Apr 17, 2018, 3:35 AM

#

no like the actual code

#

i want to understand exactly what it's doing so i can apply it to my items as well

fossil spoke Apr 17, 2018, 3:36 AM

#

All Actors have relevancy

misty stirrup Apr 17, 2018, 3:36 AM

#

yeah, i know, but like when my items aren't net relevant they still draw their static meshes

fossil spoke Apr 17, 2018, 3:36 AM

#

Your Item actors will be culled if they fall out of relevancy

misty stirrup Apr 17, 2018, 3:36 AM

#

that's 100% not happening

#

like they're beign culled network wise but not rendering wise

fossil spoke Apr 17, 2018, 3:42 AM

#

Arent they just not considered replicated, dont think they actually get destroyed

#

When i said culled i meant from an network perspective

misty stirrup Apr 17, 2018, 3:46 AM

#

ACharacter gets culled graphics wise, and im pretty sure actually gets destroyed

#

but i can't find any code proof of this happening? that's the thing thats fucking w/ me

fossil spoke Apr 17, 2018, 3:48 AM

#

Ive never delved to deep into the system so im not sure of its specifics.

#

The Character itself maybe doing that

misty stirrup Apr 17, 2018, 5:17 AM

#

this is legit bonkers

#

i can't find where it's telling it to be hidden

#

or to be destroyed() because i know for a fact that beginplay starts again when it becomes net relevant again

misty stirrup Apr 17, 2018, 5:35 AM

#

IsNetRelevantFor isn't the actual actor.cpp in the same way it's in pawn/character?

misty stirrup Apr 17, 2018, 6:36 AM

#

OKAY WELL im done trying to figure this out for the night, but i found out something new. if the character is placed down from the editor instead of spawned, they'll render no matter what.

#

so yeah. i have literally no idea.

boreal vine Apr 17, 2018, 9:30 AM

#

Hi,

#

Im spawning an actor on the server from the third person bp then possessing. it works fine but it is not spawning at the given transform. any ideas?

winged badger Apr 17, 2018, 9:33 AM

#

where is it spawning? 0,0,0?

#

and is it spawning correctly on the server?

boreal vine Apr 17, 2018, 9:42 AM

#

yeah 000

#

server is dedicated

winged badger Apr 17, 2018, 9:42 AM

#

is the actor replicating movement?

mellow cipher Apr 17, 2018, 12:36 PM

#

What role does the client have on their player?

#

Is it ROLE_SimulatedProxy or ROLE_AutonomousProxy?

winged badger Apr 17, 2018, 12:56 PM

#

AutonomousProxy

meager spade Apr 17, 2018, 1:42 PM

#

@winged badger how can i make a AI Move To search for a new target even if the old target is set and valid?

winged badger Apr 17, 2018, 1:43 PM

#

not really a channel for that, but you put a service in the root of your BT that re-evaluates the target and sets the BB value

#

they are also the root of your client's hierarchy

meager spade Apr 17, 2018, 1:46 PM

#

oh damn thought i was in AI, my bad

neon mango Apr 17, 2018, 2:14 PM

#

Hey would anyone know if I should dynamically vary these network settings on the character movement component depending on how fast I have the player moving? https://gyazo.com/a300acc730064523b9183e5873e6deef

Gyazo

hidden thorn Apr 17, 2018, 5:27 PM

#

When testing a game is there a difference between having Single Process on/off ?

neon mango Apr 17, 2018, 5:38 PM

#

@hidden thorn what do you mean exactly?

hidden thorn Apr 17, 2018, 5:41 PM

#

Would I get different results?

#

if I have Single Process off the other clients are still part of the editor

untold sun Apr 17, 2018, 6:23 PM

#

is setting a replicated variable on the GameState a synchronous operation? e.g. I have a blueprint node that sets a replicated variable - when the next node starts execution, can I assume that all clients have the new value for the replicated variable?

#

oh... NetUpdateFrequence seems to define the timing... ok!

#

@hidden thorn I would assume that you only get stable testing results if you simulate using separate processes. Simulating all using a single process speeds things up, but probably messes things up as far as I have read about that.

neon mango Apr 17, 2018, 6:49 PM

#

@untold sun that should be the case, see http://cedric-neukirchen.net/Downloads/Compendium/UE4_Network_Compendium_by_Cedric_eXi_Neukirchen.pdf page 9

meager spade Apr 17, 2018, 6:53 PM

#

need some help,

        bool bDead;```

```void AZAIBaseCharacter::Server_SetDead_Implementation(bool InBool)
{
    bDead = InBool;
    OnRep_AIDead();
}

bool AZAIBaseCharacter::Server_SetDead_Validate(bool InBool)
{
    return true;
}

bool AZAIBaseCharacter::IsAIDead()
{
    return bDead;
}```

#

bDead is returning false in anim blueprint

#

https://gyazo.com/d2791b4c3688bf8a2785812dbf610ff5

Gyazo

#

no idea why it is false in anim blueprint

untold fox Apr 17, 2018, 7:03 PM

#

yo guys! quick question

#

anyone had a problem with multiplayer projects where the server spawns pawns correctly for the host but not the clients?

#

the clients join without a problem, but seem to be spawned as spectator pawns rather than the game mode default

hidden thorn Apr 17, 2018, 7:07 PM

#

@meager spade Did you put bDead inside GetLifetimeReplicatedProps ??

meager spade Apr 17, 2018, 7:23 PM

#

yes

#

DOREPLIFETIME(AZAIBaseCharacter, bDead);

grand kestrel Apr 17, 2018, 10:10 PM

#

I'm trying to spawn a bunch of components in PostInitProperties before runtime, these components are set to replicate, the problem is that server then replicates it's components to the client and the client doesn't use the ones that were created on construction

void UVESEquipmentComponent::PostInitProperties()
{
    Super::PostInitProperties();

    if (!GetWorld() || !GetWorld()->IsGameWorld())
    {
        ConstructSlots();
    }
}```
```cpp
void UVESEquipmentComponent::ConstructSlots()
{
    if (GetEnum())
    {
        for (auto& Slot : Slots)
        {
            if (Slot.Value)
            {
                Slot.Value->DestroyComponent();
            }
        }
        Slots.Empty();

        const uint8 MaxValue = GetEnum()->GetMaxEnumValue();

        for (uint8 i = 0; i < MaxValue; i++)
        {
            if (GetEnum()->IsValidEnumValue(i))
            {
                if (StartIgnoreIndex > INDEX_NONE && i >= StartIgnoreIndex)
                {
                    break;
                }

                const uint8 EnumIndex = GetEnum()->GetValueByIndex(i);
                const FString EnumName = EnumToString(GetEnum(), EnumIndex);

                if (!IgnoredNames.Contains(EnumName))
                {
                    const FString SlotName = FString::Printf(TEXT("SLOT_%s"), *EnumName);
                    if (UVESSlot* NewSlot = NewObject<UVESSlot>(GetOuter(), FName(*SlotName)))
                    {
                        if (EquippableSlots.Contains(EnumName))
                        {
                            NewSlot->bIsDrawerSlot = true;
                        }
                        NewSlot->RegisterComponent();
                        LOGVES_WARNING("Created slot %s", *GetNameSafe(NewSlot));
                        Slots.Add(EnumName, NewSlot);
                    }
                }
            }
        }
    }
}```

grand kestrel Apr 17, 2018, 10:33 PM

#

Is there an object flag or something thats required here?

#

I don't get it

#

Why doesn't UE4 know that these objects are one in the same

#

Why is it recreating them after replication?

high nebula Apr 17, 2018, 11:06 PM

#

cant seem to update the material of the mesh on my client's screen

#

During the begin play of my ai controller I get all my variables and such from a data table, then set the data on the pawn

#

setting the health variables works

#

Do I need to set the mesh to replicate?

spare glade Apr 17, 2018, 11:20 PM

#

how do i take what actor is being damaged from this, in my gamemode? or am i just misreading the pins?

📎 unknown.png

brittle sinew Apr 17, 2018, 11:22 PM

#

This node would be for when your GameMode gets damaged, which doesn't make much sense

spare glade Apr 17, 2018, 11:23 PM

#

rip

#

i had a feeling about that

brittle sinew Apr 17, 2018, 11:23 PM

#

"Any damage" just means any type of damage, not any damage that occurs in the game

spare glade Apr 17, 2018, 11:23 PM

#

ill just do it properly then for what i wantXD

misty stirrup Apr 17, 2018, 11:39 PM

#

does anybody know why characters when they're no longer netrelevant will get destroyed but normal actors won't?

#

i've been digging around in the source and have been unable to locate the line that does this, and i've also experimented a bit and confirmed it doesn't happen for characters that are placed into the game world via the editor

misty stirrup Apr 18, 2018, 12:43 AM

#

okay you know what

#

100% fuck that question it won't help my game at all

#

is there an event that is fired when an actor becomes relevant again?

fossil spoke Apr 18, 2018, 12:54 AM

#

BeginPlay?

misty stirrup Apr 18, 2018, 12:55 AM

#

not for the default actor i think i might have to set up uhhh

#

IsNetRelevantFor in the actor ive made

#

further bug testing has found that getting in range of the item after it's been out of the 'net relevant cull distance squared' range and moved causes it to not be updated automatically meaning im pretty sure there's some funky behavior default actors are simply missing compared to the pawn/character actors

misty stirrup Apr 18, 2018, 2:54 AM

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and like the worst part is that netculldistancesquared IS netculling the actor

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it's just not render culling/destroying the actor

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which like, would be PERFECT if it was destroyed

glacial pollen Apr 18, 2018, 3:16 AM

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It really sucks to have to use a plugin for this, but I would like to thank @thin stratus for pointing me to AdvancedSessions plugin!

shadow lichen Apr 18, 2018, 4:40 AM

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Attempting to setup Networking for Animations, is it possible to compact Server or Client Events for multiple variables?

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Like say a variable changes, and Event Tick just constantly sends the Clients what the variables are Server side?

misty stirrup Apr 18, 2018, 5:22 AM

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yes that is possible i don't believe it's recommended though

shadow lichen Apr 18, 2018, 5:31 AM

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Okay thanks

slim holly Apr 18, 2018, 6:10 AM

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yup, ideal situation to send variable changes only, for the sake of saving bandwidth

shadow lichen Apr 18, 2018, 7:49 AM

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Okay, seems like when I do a preview with what I got, it works

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With 2 players

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But when I use the Dedicated Servers check my AI tree doesn't do anything

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Does Dedicated Servers register players differently or something?

slim holly Apr 18, 2018, 7:53 AM

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there are some differences what dedicated handles

shadow lichen Apr 18, 2018, 8:02 AM

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Hmm is there something that I need to change to make things work on a dedicated server?

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Related to Multiplayer, like controls, AI behavior, animations?

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Or is that all something that should be done in code/blueprint?

slim holly Apr 18, 2018, 9:28 AM

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well, dedicated doesn't load assets

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so animations aren't played for example

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therefor your gameplay can't rely on socket locations on server side

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Im sure there are other limitations, but I haven't looked into that too much

thin stratus Apr 18, 2018, 9:33 AM

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You can tick animations on Dedi Servers

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To update the Bones and thus the sockets

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Otherwise every game that uses Dedi SErverse and sockst in character hands would not work

slim holly Apr 18, 2018, 9:54 AM

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but it isn't on by default

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iirc it's at the bottom of skeletal mesh options

summer nova Apr 18, 2018, 10:37 AM

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@thin stratus what would be the easiest way to send a chunk of binary data from PC to PC in unreal?

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client->server, server->specific client, server->everyone

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turns out the ECS library i was using to do stupid shit now supports serialization, wich i plan to use to actually do network events

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by just sending specific entities from one pc to other

cedar mural Apr 18, 2018, 10:42 AM

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So currently for p2p networked play the "host" is required to go into their router settings and forward their 7777 port (default port UE4 uses). What can I do to automate this step so my users don't have to do this manually?

summer nova Apr 18, 2018, 10:44 AM

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@cedar mural use Steam

cedar mural Apr 18, 2018, 10:44 AM

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Oh, is it really that simple? lol

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Currently I've been testing with direct IP connections and it requires port forwarding. I guess steam's online subsystem will handle all that for you?

summer nova Apr 18, 2018, 10:51 AM

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yes

wintry steppe Apr 18, 2018, 10:52 AM

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@summer nova earlier you said to download the Shooter Game sample the problem is that i cant acess the code and i wanted to make my game in blueprints

bitter oriole Apr 18, 2018, 10:54 AM

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@wintry steppe Doing a serious multiplayer game is going to require C++ at some point, or at least it's going to be a much safer route

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You can get some of it to work in pure Blueprints but if you're going for multiplayer you should really spend some time looking into code

slim holly Apr 18, 2018, 11:02 AM

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there's a good selection of plugins that expand BP MP features

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but still, very basic

wintry steppe Apr 18, 2018, 11:07 AM

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@bitter oriole Im not really looking to do a multiplayer in a near future , Im new to unreal i just wanted some help on some simple things for example i wanted to download some texture and models (Gun,Player,Zombie) and then implement it to the game but i cant do it

wary wyvern Apr 18, 2018, 11:08 AM

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Is it possible to override OnRep functions? I did it somehow, but now I don't see events or function in override list..

bitter oriole Apr 18, 2018, 11:09 AM

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@wintry steppe This is the multiplayer channel so I'm guessing you need help on multiplayer

wintry steppe Apr 18, 2018, 11:09 AM

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@bitter oriole I missclicked the channel thats why xD

sterile pebble Apr 18, 2018, 11:13 AM

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@wary wyvern yep, you can. Just make them virtual

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like any other method

wary wyvern Apr 18, 2018, 11:14 AM

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@sterile pebble Yeah, but now I'm trying to override it inside blueprint.

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Btw parent class os also BP.

summer nova Apr 18, 2018, 11:15 AM

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Does unreal engine expose a game time that is coherent on both server and clients?

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i would like to use something like that to replicate stuff, in a way that it works against latency

wary wyvern Apr 18, 2018, 11:16 AM

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@sterile pebble Hmm.. I created OnRep and I can override it. But it's not possible to override old function I made in previous versions

verbal wave Apr 18, 2018, 12:29 PM

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why is unreal's native static mesh physics replication so bad? Stacked boxes jitter like crazy. I'm trying to get my hands dirty on networked physics. Apparently SM already have basic simulated extrapolation.
Is it because SM only replicate their movement individually, not as a whole physics state?

bitter oriole Apr 18, 2018, 12:32 PM

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Physics in UE4 aren't deterministic

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So there's no easy way to build reliable networking on top of that

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You are correct that just toggling "replicate movement" only replicates location

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I believe people have worked on full-physics-scene synchronization to account for this issue

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Not easy at all though

verbal wave Apr 18, 2018, 12:34 PM

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https://gafferongames.com/post/state_synchronization/
I'm reading this. I can understand most of it and think given time I'd be able to make it work.

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of course it's not gonna be easy 😃

bitter oriole Apr 18, 2018, 12:35 PM

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The basic problem here is that you can't assume that synchronized players with identical source data will simulate physics the same way

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So anything you do here is bound to have some amount of rollbacks & jitter

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Even in ideal conditions

verbal wave Apr 18, 2018, 12:38 PM

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I'm probably thinking of the same thing as you mentioned as 'full-phyics-scene', which is basically sending whole scene snapshot at like 20 fps on top of clients simuating physics on their own, right?

bitter oriole Apr 18, 2018, 12:38 PM

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Basically get the PhysX scene and send it to clients

verbal wave Apr 18, 2018, 12:38 PM

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I understand it's not deterministic

bitter oriole Apr 18, 2018, 12:38 PM

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The option I went with myself for multiplayer physics is to ignore engine physics alltogether and reimplement a deterministic, controlled subset

verbal wave Apr 18, 2018, 12:39 PM

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noob question: "Simulate Physics" in unreal is powered by PhysX?

bitter oriole Apr 18, 2018, 12:39 PM

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Yes

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This is the thing I don't use

verbal wave Apr 18, 2018, 12:39 PM

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oh so that's like super-NOT-determinstic ?

bitter oriole Apr 18, 2018, 12:41 PM

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Dunno exactly how much not 😃 Ask @chrome bay , sorry for the tag

chrome bay Apr 18, 2018, 12:44 PM

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Yep, totally not deterministic at all

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Even non-physX movement isn't entirely deterministic

verbal wave Apr 18, 2018, 12:44 PM

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I'm thinking sending the whole scene state @20 fps and interpolate it with physX

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will that work?

chrome bay Apr 18, 2018, 12:45 PM

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nope

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Sorry I've not been following the conversation, but i think I know what's being asked

verbal wave Apr 18, 2018, 12:45 PM

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aww

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I don't understand. It's only 2 frames' extrapolation. how can it be that bad?

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physX still visually makes sense

chrome bay Apr 18, 2018, 12:47 PM

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Unreal relies on PhysX for all it's collision queries

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So things will start inexplicably failing

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Also since we have no control over when the physics scene simulates in Unreal, that's easier said than done

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Also, if you're talking about a player controlling a PhysX object - then sending the entire physX state from the server still won't solve the problem

verbal wave Apr 18, 2018, 12:49 PM

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then my only easy option without implementing my own physics engine is do everything on the server, and send the snapshots?

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oh yea the delay

chrome bay Apr 18, 2018, 12:50 PM

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Sending the state for the entire PhysX simulation just isn't feasible

verbal wave Apr 18, 2018, 12:50 PM

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my physX sim scene is very small

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think Gang Beast, or Humans fall flat

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I do understand simulate entirely from server comes with bad delay

chrome bay Apr 18, 2018, 12:51 PM

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I haven't seen those - but in all cases it sounds like a custom solution that doesn't use physX at all is what you want

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It's not just that - when the client gets a correct, they need to rollback the physics scene to a previous timestamp and re-simulate with the update

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While you can apply a scene state, you can't re-simulate individual objects in a scene

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either the whole scene is simulated or nothing is

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Character Movement works because you can simulate just the movement of that one object whenever you like

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PhysX doesn't work that way unfortunately

verbal wave Apr 18, 2018, 12:54 PM

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makes sense. Character Movement has that saved moveset thing

chrome bay Apr 18, 2018, 12:54 PM

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If you want PhysX Controlled pawns for the time being, the best approach right now is to make them client-authoritative and just do some basic sanity checks on the server to prevent cheating

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It's not perfect but it just about does the job. You could also implement some custom smoothing if you wanted to

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Personally I just avoid physX like the plague and write my own movement comps like Character Movement - but that's a big task in itself

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If Character Movement wasn't such a horrendously monolithic class, it would make life a lot easier

bitter oriole Apr 18, 2018, 12:56 PM

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^ also my approach here.

verbal wave Apr 18, 2018, 12:56 PM

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Yea I'm still researching for valid options.. I'm the only programmer & designer in my team. Barely have time to eat 😐

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client-authoritative seemed to work but it has a lot of limites

bitter oriole Apr 18, 2018, 12:57 PM

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I've got a similar approach for a MP vehicle game where physics are entirely simulated in code. Though i don't know for sure, I also strongly suspect this is what a game like Sea of Thieves does

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(UE4 MP game with ships)

chrome bay Apr 18, 2018, 12:57 PM

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Yeah I'm willing to bet it does for sure

bitter oriole Apr 18, 2018, 12:58 PM

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It's fairly certain since many edge-cases, including de-penetration, showcase wholly un-physical behavior

chrome bay Apr 18, 2018, 12:59 PM

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I guess they probably have some kind of bouyancy thing that reads from the waves as well

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So must be something very bespoke

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I remember the Battlefield team talking about having to have a network syncronised wave simulation for their boats in BF4, it was crazy

verbal wave Apr 18, 2018, 1:00 PM

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sounds like pain..

chrome bay Apr 18, 2018, 1:00 PM

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MP is pain 😄

bitter oriole Apr 18, 2018, 1:00 PM

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Nothing in MP is anywhere near easy yeah

chrome bay Apr 18, 2018, 1:00 PM

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nothing but pain

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Super satisfying when it works, soul destroying when it doesn't 😄

bitter oriole Apr 18, 2018, 1:01 PM

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Something like kicking a can on the floor and have it bounce around is entirely trivial in single player, and basically two weeks of C++ work in MP

chrome bay Apr 18, 2018, 1:01 PM

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one day someone will release a sweet open-source deterministic physics library... but alas it is not this day

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or century

verbal wave Apr 18, 2018, 1:01 PM

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I'm slowly getting used to thinking about things in five different ways..

chrome bay Apr 18, 2018, 1:01 PM

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probably

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Mind you Epic have only just made is possible to cleanly compile the engine with WITH_PHYSX 0

bitter oriole Apr 18, 2018, 1:02 PM

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Simple example like that can shooting still requires autonomous sim on the client (moves immediately locally), a server RPC, server-side simulation, replication with replay & rollback on that same client, + basic inteprlated replication on other clients

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Three code paths and your own physics in the code

chrome bay Apr 18, 2018, 1:03 PM

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yeah

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It's a lot of work

bitter oriole Apr 18, 2018, 1:03 PM

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To be fair, once you have written that once, you can probably use it for most objects with ease

chrome bay Apr 18, 2018, 1:04 PM

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That's pretty much where I'm getting to now, having some reusable basic classes that I can adapt for most kinds of movement

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I really want to get it to a state where anyone can use it

verbal wave Apr 18, 2018, 1:04 PM

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have you guys played Stick Fight? it seems to be a great example of no fucks given client authoritative physics

bitter oriole Apr 18, 2018, 1:04 PM

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eXi used to have a sample project with that for ball-type pawns, I asked him if it's still online somewhere

verbal wave Apr 18, 2018, 1:06 PM

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if replicated physics is off the table, designing around it would be my only sane option

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stick fight got away with it because it's fast loop-based and everything just falls down

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https://github.com/TheJamsh/UE4-Networked-PhysX-Component
have this in my bookmarks

GitHub

TheJamsh/UE4-Networked-PhysX-Component

UE4-Networked-PhysX-Component - A solution for PhysX Pawns with Prediction and Reconciliation in Unreal Engine 4.

bitter oriole Apr 18, 2018, 1:08 PM

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Depending on the gameplay you want you can still do your own physics, too

verbal wave Apr 18, 2018, 1:08 PM

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oh hey it's @chrome bay himself lol. what a pleasure

chrome bay Apr 18, 2018, 1:09 PM

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Yeah that one has some problems unfortunately 😦

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I was still learning as I was writing it, and it has one massive flaw which is that between updates the server is of course still simlating the physics scene

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And I hadn't worked around that part

verbal wave Apr 18, 2018, 1:10 PM

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@bitter oriole that actually doesn't sound impossible since our game is cube based. Thanks for all the info and knawwledge

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why can't we just have nice things without overcoming mountians😐

chrome bay Apr 18, 2018, 1:13 PM

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welcome to video games 😄

verbal wave Apr 18, 2018, 1:14 PM

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love that mindset

bitter oriole Apr 18, 2018, 1:23 PM

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@verbal wave More like welcome to multiplayer games. You'll enjoy the part where you get to cheating, too

verbal wave Apr 18, 2018, 1:27 PM

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I simply can't wait! The ultimate motivation to make a great MP game

burnt meteor Apr 18, 2018, 2:05 PM

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===

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Announcement what we all have been waiting for: https://www.youtube.com/watch?v=iMNjp5L7_oA

YouTube

XebatnikTV

Unreal Engine 4.18.3 Dedicated Server Tutorial (Steam / Advanced S...

This video shows you how I got a dedicated server working on Steam with UE4 4.18.3 using the Advanced Sessions Plugin. Please use these below jump points to ...

▶ Play video